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One Piece: With Sign-in System

Ron finds himself reborn in the world of One Piece, stranded on a remote island in the East Blue. But he's not just any ordinary child—he’s bonded to a mysterious sign-in system that grants him unimaginable power with every new location he visits. At his first sign-in, he unlocks the legendary Sun Breathing Technique, along with a boost to his vitality. From Shitmotsuki Village to Skypiea, Enies Lobby to Marineford, Ron travels the world, collecting extraordinary rewards that make him a force to be reckoned with. The Raikiri, one of the 21 Great Grade Swords, Armament Haki, Observation Haki, and more fall into his hands. As Ron steps onto the battlefield of Marineford during the legendary Summit War, the mightiest warriors—Four Emperors and Marine Admirals alike—pause, stunned by his presence. But Ron merely waves them off, "Don’t mind me. I’m just passing through." Join Ron on his journey across the Grand Line as he signs in at iconic locations, growing stronger with every step. This is not just an adventure—it’s a legend in the making.

ElvenKing20 · Cómic
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53 Chs

An Unexpected Encounter with Sabo

"If my guess is correct…"

Korv's eyes burned as he looked at the sword on Ron's back:

"That sword must be one of the Twenty-One Great Grade Blades, the one said to cut through thunder itself—Raikiri!"

The members of the Revolutionary Army were all shocked.

Even Dragon and Kuma glanced at the sword on Ron's back.

"I didn't expect to see this sword reappear."

Korv couldn't help but rub his hands, his eyes full of excitement.

Ivankov stepped forward, standing between Korv and Ron, and bent down, saying, "Korv, don't get any ideas about Ron boy's sword."

"I wouldn't! I just wanted to take a closer look! This sword has been lost for hundreds of years. To a swordsman, it's like seeing a peerless beauty. How could I resist?"

Korv quickly explained.

"Ron," Kuina tugged on Ron's sleeve, "maybe we should get off here."

Ron snapped out of his thoughts, was startled for a moment, then nodded. "Alright, let's get off here."

He turned to Dragon and Ivankov and said, "We've decided to disembark here."

"Ron boy…"

"Since you've made your decision, we won't stop you," Dragon said, watching Ron. "But be careful on this island."

Ron nodded.

As he and Kuina prepared to leave the ship, Kuma walked up to them, towering over the two.

Kuina, feeling intimidated by Kuma's large frame, edged closer to Ron.

Kuma bent down and opened his massive palm, revealing a few pieces of candy.

Ron was taken aback. "Are these for us?"

Kuma nodded.

Such a gentle person… Ron thought to himself.

But then, remembering Kuma's future fate, he fell silent.

After taking the candy and thanking him, Ron and Kuina headed into the forest near the shore.

Kuma raised his hand and waved at them.

Ivankov, watching this scene, laughed with hands on hips, "Kuma is always so fond of children."

In the forest...

"Where are we going now?" Kuina asked Ron.

"To the Goa Kingdom."

Goa Kingdom...

The moment Ron stepped into the kingdom, a familiar system prompt echoed in his mind.

[Detected location: Goa Kingdom. Sign-in conditions met. Sign in now?]

"Sign in."

[Sign-in complete. Reward obtained: Vitality +10.]

Ron waited for a while but heard no more system prompts. His face darkened.

"That's it?"

"What's wrong?" Kuina asked, turning to look at him while eating a skewer of roasted meat.

"Nothing."

Ron forced a smile.

"Good," Kuina said, not paying much attention as she admired the surroundings. "This place is so beautiful. The streets are spotless, and it smells like flowers. It's nothing like Shimotsuki Village."

"It's just the surface," Ron said flatly.

"Huh?" Kuina blinked in confusion.

"You'll understand soon enough."

It didn't take long for Kuina to understand.

When she asked an elegant, kind-looking old man for directions and revealed she wasn't from a noble family, his face turned dark. He coldly called the street guards to drive her away.

Kuina instantly understood Ron's earlier words.

This seemingly glamorous place was rotten with the stench of nobility.

"Do you still think this place is better than Shimotsuki Village?" Ron asked as they were chased by a group of heavily armored guards.

"Absolutely not!" Kuina shouted, "Shimotsuki Village is a hundred times better than this!"

As they ran through a street, Ron caught sight of a blond boy with goggles and a suit running anxiously in a certain direction.

Ron immediately recognized him.

One of Luffy's two brothers.

The noble-born Sabo.

But at that moment, a group of noble guards appeared behind and in front of Sabo, tackling him to the ground as he struggled desperately.

"Let me go! I have to save them! I must save them!" Sabo shouted, struggling against the guards.

The guards held him down without mercy.

Ron's eyes narrowed as he watched, then he suddenly stopped.

"Kuina, wait for me outside the city," he said.

"Huh? What?" Kuina hadn't fully processed what was happening when she saw the city guards rushing toward Ron.

But they grabbed at nothing.

In the next second, a powerful punch landed in the stomach of the lead guard, causing him to roll his eyes and collapse unconscious.

"I'll meet up with you later," Ron said to Kuina.

Kuina nodded. "I understand."

She didn't know what Ron was going to do, but she trusted him unconditionally.

After Kuina left, the remaining city guards raised their weapons and charged at Ron.

"You brat knocked out the captain!"

Ron's figure flickered, and a flurry of punches followed.

In seconds, the towering guards were all unconscious, eyes rolled back.

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T/N:

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